6591254594681 has 2 divisors, whose sum is σ = 6591254594682. Its totient is φ = 6591254594680.

The previous prime is 6591254594647. The next prime is 6591254594699. The reversal of 6591254594681 is 1864954521956.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6287230279225 + 304024315456 = 2507435^2 + 551384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6591254594681 is a prime.

It is a super-2 number, since 2×6591254594681² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6591254591681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3295627297340 + 3295627297341.

It is an arithmetic number, because the mean of its divisors is an integer number (3295627297341).

Almost surely, 2^{6591254594681} is an apocalyptic number.

It is an amenable number.

6591254594681 is a deficient number, since it is larger than the sum of its proper divisors (1).

6591254594681 is an equidigital number, since it uses as much as digits as its factorization.

6591254594681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312000, while the sum is 65.

The spelling of 6591254594681 in words is "six trillion, five hundred ninety-one billion, two hundred fifty-four million, five hundred ninety-four thousand, six hundred eighty-one".